Correct way to get " " to print

Question

Starting over Since I am terrible at question asking..haha

I am using a .php script that displays information to the user.

echo CHtml::tag("hr");
echo "<b>Crontab Command Line</b>:";
echo CHtml::opentag("pre");
echo "(crontab -l 2>/dev/null; echo '@reboot sleep 60 && {$coin->program} -
daemon -txindex -shrinkdebugfile') | crontab -\n";
echo "\n";
echo CHtml::closetag("pre");

when it displays on the webpage it shows as

(crontab -l 2>/dev/null; echo "@reboot sleep 60 && ${coin->program} -daemon 
-txindex -shrinkdebugfile") | crontab -\n

I am trying to correctly have it display

(crontab -l 2>/dev/null; echo "@reboot sleep 60 && variablename -daemon 
-txindex -shrinkdebugfile") | crontab -\n

So that the user can copy and paste that line in to SSH and have it added to the users cron

its displayed to be copied to the CLI

Please clarify your question, which programming language are you using? — webNeat, Oct 09 '17 at 21:06

Barmar · Answer 1 · 2017-10-10T16:20:45.793

0

Change the inner double quotes to single quotes. You're not using any bash variables inside the string, so there's no need to use double quotes in the bash command.

echo "(crontab -l 2>/dev/null; echo '@reboot sleep 60 && {$coin->program} -daemon -txindex -shrinkdebugfile') | crontab -\n";

Difference between single and double quotes in Bash

If you really do need double quotes in the bash command you're writing, you can escape them.

echo "(crontab -l 2>/dev/null; echo \"@reboot sleep 60 && {$coin->program} -daemon -txindex -shrinkdebugfile\") | crontab -\n";

edited Oct 10 '17 at 16:20

answered Oct 09 '17 at 21:22

Barmar

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Thank you! that printed the " " but now it doesnt print from {$coin->program} – Jonathan Adams Oct 09 '17 at 21:29
What do you expect that to print? – Barmar Oct 09 '17 at 21:31
`bash` doesn't use `->` after variables. Are you sure this isn't PHP? – Barmar Oct 09 '17 at 21:32
hmmm i had selected php not sure why it switched to the other two – Jonathan Adams Oct 09 '17 at 21:48
The question originally was tagged `c++`. – Barmar Oct 09 '17 at 21:49
syntax error, unexpected 'echo' (T_ECHO), expecting ',' or ';' – Jonathan Adams Oct 09 '17 at 21:59
Sorry, forgot to add back the `;` when I switched from bash to php. – Barmar Oct 09 '17 at 22:00
we are back to the single ' when it needs to be a double. Sorry for all the bother – Jonathan Adams Oct 10 '17 at 04:21
Why do you think the inner quotes need to be double quotes rather than single quotes? – Barmar Oct 10 '17 at 16:19
ive update the question to hopefully explain better of what i am after – Jonathan Adams Oct 10 '17 at 20:16
`$` should be after `{` not before it. – Barmar Oct 10 '17 at 20:31
`${coin->program}` should be `{$coin->program}` – Barmar Oct 10 '17 at 20:32

Correct way to get " " to print

1 Answers1